# Capacity Planning
+ Due to many factors, the ratio of flat file capacity to cluster capacity cannot be accurately estimated, so capacity planning is generally done empirically:
  + At least reserving `30%` for available space
  + Capacity `2.7~3.34` times the size of the flat file
![`smart`](CapacityPlanning_aa_001_20221027.png)

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Consider reserving `30%` of the space, the cluster capacity should be `2.7~3.34` times the size of the flat file. Combined with the actual situation, it is assumed that the user needs the estimated capacity of 3 years, which can be directly calculated by 3 times. If the user needs to estimate the capacity in 1 year or less (i.e. there is only one purchasing window), a sufficient estimate should be given, using 3.5 times or higher.